Agilent InfiniiMax III
probing system
Data Sheet
World’s highest speed and highest performing probe system
• Full 30 GHz bandwidth to the probe tip
• Industry’s lowest probe and scope system noise
• Industry’s highest fidelity and accuracy due to
bandwidth and extremely low loading
• Probe amplifiers loaded with measured s-parameters
for more accurate response correction
• Bandwidth upgradable
• Variety of probe heads for different use models with
maximum usability
Unmatched Performance
Industry leading probe bandwidth
The InfiniiMax III probing system offers you the highest
performance available for measuring differential and
single-ended signals, with flexible connectivity solutions for
today’s high-density ICs and circuit boards. Four different
InfiniiMax III probe amplifiers ranging from 16 GHz to 30
GHz are available for matching your probing solution to your
performance and budget requirements. A proprietary 200
GHz fT InP (indium phosphide) IC process with backside
ground vias and novel thick film technology is utilized to
accommodate your highest performance needs and is
unmatched by any product in the market.
Highest fidelity and accuracy
InfiniiMax III provides the highest bandwidth and incredibly
low loading to allow for a new level of signal fidelity and
accuracy. Continuing the probe head topology pioneered by
Agilent in the InfiniiMax I and II probe systems, four new
probe heads are provided to accommodate multiple use
models: an 30 GHz browser that is extremely usable, an
25/28 GHz ZIF probe head with economical replaceable/
removable ZIF tips, an 28 GHz 2.92 mm probe head which
allows cabled measurements using 2.92 mm, 3.5 mm, or
SMA coax cables, and an economical 16/26 GHz solder-in
probe head for demanding measurements.
Uncompromised Usability
More accurate probe correction
Each individual InfiniiMax III probe amplifier contains
its own frequency response data. The 90000-X/Q Series
oscilloscopes download this data and automatically correct
the response of the unique probe system. Traditionally, probe
correction uses a nominal model based on a typical probe
amplifier, not the specific amplifier being used. Generally,
the biggest variation between probing systems is a result
of the probe amplifier. The ability to correct a specific
probe amplifier’s response results in a more accurate probe
correction, which yields a more accurate measurement.
Extensive line-up of probe heads and accessories
Agilent’s InfiniiMax III probes support a wide variety of
high-speed applications with an extensive line-up of probe
heads and accessories.
• N5445A browser head (30 GHz) is the best choice
for general-purpose trouble shooting of differential
signals with z-axis compliance and variable spacing
from 20 mil – 125 mil (or 0.5 mm – 3.1 mm). The span
between the signal tips is easily adjusted with a
thumb wheel on the browser. Integrated LED lighting at
the tip illuminates the probing area for better visibility.
Order N5476A for replacement browser tips (set of 4).
12
9
6
3
0
-3
-6
Correction
No Correction
-9
-12
-15
-18
1E8
1E9
Frequency Hz
1E10
4E10
2
• N5439A ZIF probe head provides 28 GHz bandwidth
in an economical replaceable tip form factor. Because
of their extremely low loading, the ZIF tips can be left
on the DUT as the probe head is moved from one
probing site to the next. Order N5440A (450 Ω
ceramic), N5447A (200 Ω ceramic) or the new N2838A
(450 Ω PC board) for a set of 5 ZIF tips with plastic
sporks to aid in soldering the tips to your DUT.
The N2838A PC board ZIF tip increased the robustness
of the ZIF tip significantly while maintaining the
bandwidth performance up to 25 GHz when used in
conjunction with the N2803A and N5439A. Variable
spacing from 5 mil – 80 mil (or 0.127 mm – 2 mm).
• N5444A 2.92 mm/3.5 mm/SMA probe head (28 GHz)
allows you to connect two 2.92 mm, 3.5 mm or SMA
cables to make a differential measurement on a single
oscilloscope channel. Order N5448A 2.92 mm head flex
cables (10” or 25 cm) to extend the cable length and add
convenience.
The N5444A provides for a termination to a common DC
voltage rather than to ground, which is required for many
signal standards. It is implemented such that from DC to
~1kHz the termination is 55 Ω to the termination voltage,
and above ~10 kHz the termination is 50 Ω to 0.9 times
the termination voltage. The termination voltage range
is ±4 V with a minimum step of 5 mV and a maximum
current of 80 mA. The termination voltage can be
controlled internally by the oscilloscope or applied
externally using the supplied DC jack.
• N5441A solder-in probe head is an economical, semi permanent connection that provides up to 16 GHz
of bandwidth. Variable span of the leads ranges from
5 mil – 80 mil (or 0.127 mm – 2 mm).
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